Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 115 · 40 questions

Engineer's tip (Find the topic, use the idea): Find the topic: force, friction, machine, lever class, balance, pulley or work. Use that lesson’s rule — what is in the middle, load × distance = effort × distance, effort = load ÷ ropes, work = force × distance. Write the calculation before you answer.

1. 1.True or false: a wheelbarrow is a class 1 lever (fulcrum in the middle). (a) True (b) False
2. 2.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.⚖️ Turning effect = force × … (a) time taken (b) distance from fulcrum (c) mass of fulcrum (d) colour of bar
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a wooden plank 4 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
5. 5.🔍 Which is the odd one out? (a) a seesaw (b) a crowbar (c) a truck loading ramp (d) a bottle opener
6. 6.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
7. 7.🔍 Which is the odd one out? (a) a playground slide (b) a truck loading ramp (c) a road up a hill (d) a well-bucket rope wheel
8. 8.Which of these is a pulley? (a) a water tap handle (b) a road up a hill (c) a well-bucket rope wheel (d) a wood screw
9. 9.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 4 N, a wooden plank 5 N, a carpet 7 N. How many newtons more were needed on sandpaper than on a glass sheet?
11. 11.⚙️ A screw is really … (a) a kind of wheel (b) a tiny pulley (c) a bent lever (d) a ramp wrapped round
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 90 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
13. 13.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
14. 14.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
15. 15.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
16. 16.🏋️ A force of 240 N did 1440 J of work. How many metres did the object move?
17. 17.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
18. 18.⚖️ A seesaw balances. Zoya (600 N) sits ? m from the pivot on one side; Meena (200 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
19. 19.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
20. 20.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 80 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
22. 22.💪 A force is a … (a) unit of time (b) kind of colour (c) type of sound (d) push or a pull
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 30 cm and the load at 80 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
24. 24.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the load (c) the fulcrum (d) nothing
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 3 N, a glass sheet 6 N, a wooden plank 10 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
26. 26.True or false: a nutcracker is a class 3 lever (effort in the middle). (a) True (b) False
27. 27.⚖️ A seesaw balances. Asha (130 N) sits 4 m from the pivot on one side; Zoya (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
28. 28.Which of these is a screw? (a) the tip of a nail (b) a door stopper (c) a nut and bolt (d) a seesaw
29. 29.True or false: a nutcracker is a lever. (a) True (b) False
30. 30.💪 Which force is at work: a compass needle turns? (a) friction (b) muscular force (c) gravity (d) magnetic force
31. 31.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
32. 32.🪝 A load of 520 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 9 N, a glass sheet 2 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
34. 34.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) farther from the pivot (c) on the pivot (d) closer to the pivot
35. 35.Which of these is caused by magnetic force? (a) a magnet picks up pins (b) a rolling ball slows (c) a thrown ball comes down (d) rubbing hands warms them
36. 36.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) turning effects match (d) the fulcrum moves
37. 37.💪 A box weighs 350 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
38. 38.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
39. 39.⚖️ A seesaw balances. Ravi (600 N) sits 4 m from the pivot on one side; Meena (800 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
40. 40.⚖️ A seesaw balances. Arjun (330 N) sits 2 m from the pivot on one side; Kabir (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids